PRO just announced a voluntary recall on the Hi-Comp Stem due to a safety issue they have came across. The PRO Hi-Comp Stem is manufactured for road bikes, and were produced between November 2003 to June 2006. Sadly due to fatigue the stems may crack or break, and when flying at high speeds you can loose control which can cause bodily harm. If you have purchased this stem, return right away to the store you have purchased from, and they will give you a refund.
…

Easton Sports has voluntarily recalled its EA30 stems that were sold between August 2007 and September 2009, as reported U.S. Consumer Product Safety Commission. Easton has received a report that one of their stems broke and caused minor injury to the rider. The number of stems affected by Easton’s recall is about 6,400. If you have an EA30 stem, you should stop using it immediately and contact Easton Sports for a replacement. Check out Easton’s Web site for more information.

If you’re looking for a good, strong, lightweight stem, the Cinelli Neo CK Stem may be the way to go. It is built with forged 7075 T6 alloy and reinforced with a layer of 3K plain carbon, with a special carbon/kevlar fabric. It comes in sizes 90, 100, 110, 120, and 130mm. The super lightweight Cinelli Neo CK Stem weighs only 130 grams. The Cinelli Neo CK Stem has been designed to match with the Cinelli Carbon Fiber handlebars.

The Sunline XC-One 2009 Stem is built for downhill and cross country riders. It weighs a mere 121 grams, with a 1-1/8 inch steerer size. It is made with aluminum, with a six degree angle. With the Sunline XC-One 2009 Stem, you also have length options, which are: 100mm, 110mm, and 90mm. The clamp size is 31.8cm, and you can choose either black or gray for the color. The Sunline XC-One 2009 Stem retails for $99.95.